/* ==========================================================================
   Wirtualna Biblioteka - Mobile-First CSS Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* Color Tokens - Modern Obsidian & Indigo Theme */
  --bg-primary: #0b0f19;
  --bg-secondary: #131b2e;
  --bg-card: rgba(26, 36, 60, 0.65);
  --bg-card-hover: rgba(36, 50, 82, 0.8);
  --bg-glass: rgba(19, 27, 46, 0.85);
  
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.35);
  
  --accent-secondary: #06b6d4;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --accent-purple: #8b5cf6;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(99, 102, 241, 0.4);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
  
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Light Theme Overrides */
[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(248, 250, 252, 1);
  --bg-glass: rgba(255, 255, 255, 0.9);
  
  --accent-primary: #4f46e5;
  --accent-glow: rgba(79, 70, 229, 0.2);
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-subtle: #94a3b8;
  
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-active: rgba(79, 70, 229, 0.3);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 20% 15%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 80% 85%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

/* --------------------------------------------------------------------------
   App Container & Phone Mockup Frame
   -------------------------------------------------------------------------- */
/* --------------------------------------------------------------------------
   App Container & Responsive Layout (Mobile & Desktop Auto)
   -------------------------------------------------------------------------- */
.app-wrapper {
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0;
  min-height: 100vh;
}

/* Responsive Main Container */
.phone-container {
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: max-width var(--transition-normal);
}

@media (min-width: 768px) {
  .phone-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 16px;
  }
}

@media (min-width: 1280px) {
  .phone-container {
    max-width: 1240px;
  }
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #fff 30%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-icon {
  font-size: 1.4rem;
  -webkit-text-fill-color: initial;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px 4px 4px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
}

.user-badge:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--border-active);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: #fff;
}

.user-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  max-width: 90px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --------------------------------------------------------------------------
   Main Content Area & Views
   -------------------------------------------------------------------------- */
.app-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  padding-bottom: 90px; /* Space for bottom nav */
  scroll-behavior: smooth;
}

.view-section {
  display: none;
  animation: fadeIn 0.3s ease-out forwards;
}

.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   Auth / Login Screen
   -------------------------------------------------------------------------- */
.auth-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
  text-align: center;
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 360px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  font-size: 3rem;
  margin-bottom: 12px;
  display: inline-block;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.auth-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.auth-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: rgba(0, 0, 0, 0.35);
}

.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-hover));
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 14px;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary {
  width: 100%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
}

.auth-switch {
  margin-top: 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.auth-switch span {
  color: var(--accent-secondary);
  cursor: pointer;
  font-weight: 600;
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Search, Compact Filters & Controls
   -------------------------------------------------------------------------- */
.search-bar-wrapper {
  position: relative;
  margin-bottom: 10px;
}

.search-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 10px 16px 10px 38px;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  backdrop-filter: blur(10px);
  transition: var(--transition-fast);
}

.search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

/* Compact Filter Rows */
.filter-scroll {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 8px;
  scrollbar-width: none;
}

.filter-scroll::-webkit-scrollbar {
  display: none;
}

.chip {
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 4px;
}

.chip:hover, .chip.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.chip .count {
  background: rgba(255, 255, 255, 0.2);
  padding: 1px 5px;
  border-radius: 8px;
  font-size: 0.68rem;
}

.sub-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.sort-select {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  color: var(--accent-secondary);
  font-weight: 600;
  font-size: 0.78rem;
  outline: none;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   Book Library List & Grid Views
   -------------------------------------------------------------------------- */
.books-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (min-width: 580px) {
  .books-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }
}

@media (min-width: 860px) {
  .books-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }
}

@media (min-width: 1140px) {
  .books-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
  }
}

.book-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.book-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-active);
  box-shadow: var(--shadow-lg);
}

.book-cover-container {
  width: 100%;
  aspect-ratio: 2/3;
  background: #1a2234;
  position: relative;
  overflow: hidden;
}

.book-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.book-card:hover .book-cover-img {
  transform: scale(1.05);
}

.book-status-badge {
  position: absolute;
  top: 6px;
  right: 6px;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
}

.status-read { background: rgba(16, 185, 129, 0.85); color: #fff; }
.status-reading { background: rgba(6, 182, 212, 0.85); color: #fff; }
.status-want { background: rgba(245, 158, 11, 0.85); color: #fff; }

.fav-btn {
  position: absolute;
  top: 6px;
  left: 6px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  border: none;
  color: #fff;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition-fast);
}

.fav-btn.active {
  color: #f43f5e;
}

.book-info {
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.book-title {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 3px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-author {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.book-meta-footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
}

.rating-stars {
  color: var(--accent-warning);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 2px;
}

.progress-bar-container {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  margin-top: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 3.5rem;
  margin-bottom: 12px;
  opacity: 0.7;
}

.empty-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

/* --------------------------------------------------------------------------
   Scanner & Camera View
   -------------------------------------------------------------------------- */
.scanner-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.camera-preview-box {
  width: 100%;
  aspect-ratio: 3/4;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  border: 2px dashed var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
}

.camera-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scanner-overlay {
  position: absolute;
  inset: 0;
  border: 2px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.scanner-frame {
  width: 75%;
  height: 70%;
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 4000px rgba(0, 0, 0, 0.55);
  position: relative;
  overflow: hidden;
}

.scan-laser {
  position: absolute;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-secondary), transparent);
  box-shadow: 0 0 12px var(--accent-secondary);
  animation: scanAnim 2.2s ease-in-out infinite alternate;
}

@keyframes scanAnim {
  0% { top: 5%; }
  100% { top: 92%; }
}

.scanner-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  width: 100%;
}

.hidden-file-input {
  display: none;
}

/* --------------------------------------------------------------------------
   AI Bot Assistant Interface
   -------------------------------------------------------------------------- */
.ai-chat-container {
  display: flex;
  flex-direction: column;
  height: 75vh;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.chat-header {
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
}

.bot-avatar-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message-bubble {
  max-width: 85%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.45;
  word-wrap: break-word;
  animation: msgPop 0.2s ease-out;
}

@keyframes msgPop {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.msg-bot {
  align-self: flex-start;
  background: rgba(30, 41, 59, 0.9);
  color: var(--text-main);
  border-bottom-left-radius: 2px;
  border: 1px solid var(--border-subtle);
}

.msg-user {
  align-self: flex-end;
  background: var(--accent-primary);
  color: #fff;
  border-bottom-right-radius: 2px;
}

.chat-input-area {
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.25);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  gap: 8px;
}

.chat-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 10px 16px;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
}

.chat-send-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: none;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.chat-send-btn:hover {
  transform: scale(1.05);
}

/* Quick Prompts Chips */
.quick-prompts {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 6px 12px;
  scrollbar-width: none;
}

.quick-chip {
  font-size: 0.75rem;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-secondary);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   Book Detail Modal / Sheet
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  background: var(--bg-secondary);
  border-top-left-radius: 28px;
  border-top-right-radius: 28px;
  overflow-y: auto;
  padding: 24px;
  position: relative;
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  border-top: 1px solid var(--border-subtle);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-drag-handle {
  width: 40px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  margin: 0 auto 16px auto;
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--text-main);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   Fixed Bottom Navigation Bar (Zawsze widoczny na dole)
   -------------------------------------------------------------------------- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  height: 68px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 1500;
  padding: 0 16px;
  padding-bottom: max(0px, env(safe-area-inset-bottom));
}

.phone-container.full-width .bottom-nav {
  max-width: 100%;
  left: 0;
  transform: none;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  color: var(--text-muted);
  background: none;
  border: none;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  padding: 6px 16px;
  border-radius: var(--radius-md);
  position: relative;
}

.nav-icon {
  font-size: 1.3rem;
  transition: transform 0.2s ease;
}

.nav-item:hover, .nav-item.active {
  color: var(--accent-primary);
}

.nav-item.active .nav-icon {
  transform: translateY(-2px) scale(1.1);
  color: var(--accent-primary);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  width: 16px;
  height: 3px;
  background: var(--accent-primary);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-primary);
}

/* Floating Action Center Scan Button */
.nav-item-scan {
  position: relative;
  top: -14px;
}

.scan-fab {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: var(--shadow-glow);
  cursor: pointer;
  transition: var(--transition-spring);
}

.scan-fab:hover {
  transform: scale(1.1) rotate(5deg);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  background: none;
  border: none;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  position: relative;
}

.nav-icon {
  font-size: 1.3rem;
  transition: transform 0.2s ease;
}

.nav-item:hover, .nav-item.active {
  color: var(--accent-primary);
}

.nav-item.active .nav-icon {
  transform: translateY(-2px) scale(1.1);
  color: var(--accent-primary);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  width: 16px;
  height: 3px;
  background: var(--accent-primary);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-primary);
}

/* Floating Action Center Scan Button */
.nav-item-scan {
  position: relative;
  top: -14px;
}

.scan-fab {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: var(--shadow-glow);
  cursor: pointer;
  transition: var(--transition-spring);
}

.scan-fab:hover {
  transform: scale(1.1) rotate(5deg);
}

/* --------------------------------------------------------------------------
   Toast Notifications System
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 90%;
  max-width: 380px;
  pointer-events: none;
}

.toast {
  background: rgba(19, 27, 46, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-active);
  color: var(--text-main);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-12px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Statistics Charts Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-val {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-secondary);
}

.stat-lbl {
  font-size: 0.78rem;
  color: var(--text-muted);
}